This lesson was originally created for grade 5 math students in my building, but it is very suitable for grades 6-8. The lesson guides students to explore an applet by NCTM Illuminations. In the lesso...More: lessons, discussions, ratings, reviews,...

An application problem that asks students to help an excavation company prepare a bid for one of their clients by calculating what they should charge to dig a hole. To solve the problem students must ...More: lessons, discussions, ratings, reviews,...

Fill a box with cubes, rows of cubes, or layers of cubes. The number of unit cubes needed to fill the entire box is known as the volume of the box. Can you determine a rule for finding the volume of a...More: lessons, discussions, ratings, reviews,...

Small Stella is the ideal entry-level polyhedron program for schools or anyone interested in geometry, with hundreds of polyhedra provided. Print out the nets required to build your own paper model...More: lessons, discussions, ratings, reviews,...

This is a free JAVA applet that helps users to study spatial geometry in a dynamic and interactive way. Using it, the user can rotate, zoom out, zoom in and translate a plethora of polyhedra. Moreover...More: lessons, discussions, ratings, reviews,...

Fill a glass with the requested amount of liquid by filling, emptying, and pouring between it and a second container. Click the "New Problem" button to generate new parameters; "Challenge" creates con...More: lessons, discussions, ratings, reviews,...

This game challenges you to identify a three-dimensional object based only on its intersections with a plane. The height of this plane can be changed using a slider control. This simulation of a compu...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate the volume of a cube.
A cube is shown where the edge length can be changed by dragging.
The volume is continuously recalculated ...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate the volume of a cylinder.
A cylinder is shown where the height and radius can both be changed by dragging.
The volume is continu...More: lessons, discussions, ratings, reviews,...

Enter the radius and height and the script will calculate the volume for the 3 shapes. If the height is equal to 2r, the relationship of the cone being 1/3 of the volume of the cylinder, the sphere be...More: lessons, discussions, ratings, reviews,...

The user learns about cylinders, cones, and spheres and the properties and volume formulas for each. After viewing examples, users can interactively test their understanding of these three-dimensiona...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.